Eyeglasses.



L. F. ADT.

EYEGLASSES.

APPLICATION man MAY 11. 1912.

Patented Oct. 22, 1918.

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LEO F. .ADT, 01? ALBANY, NEW YORK.

Application filed May 11, 1912,.

be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numerals marked thereon.

My present invention relates to eyeglass mountings more particularly to eyeglasses of the finger-piece type, and it has for one of its objects to provide a simple, durable and efficient means for establishing pivotal connection between the guard levers and their support. Another object of the invention is to provide a strong, efficient and durable spring so disposed and connected as to be readily applied and detached from the mounting along with, or independently of, the lever that'it operates. To these and other ends the invention consists in certain improvements and combinations of parts all as will be hereinafter more fully de scribed, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure 1 is a front elevation of an eyeglass constructed in accordance with and illustrating one embodiment of my invention.

Fig. 2 is a top plan view.

Fig. 3 is an enlarged section taken axially of one of the guard levers, substantially on the line 33 of Fig. 2.

Fig. 4 is a section taken substantially on the line of Fig. 3.

Fig. 5 is a perspective view of one of the springs and i 'Fig. 6 is a view corresponding to Fig. 3 showing a modified form of pivot post.

Similar reference numerals in the several vfigures indicate the same parts. 'The mounting as a whole, or rather the Spec ification of Letters Patent.

EYEGLASSES.

Serial No. 696,591.

cept that they are right, and left construction, and hence a description of one will suifice for both.

Each guard lever 5 swings in a horizontal plane and extends from front to rear, as

a ented 21 918. I

usual, between the bridge end and adjacent lens attaching portion, being provided with a suitable finger-piece 15 at the front end and nose-bearing portion 6 at the rear end, having upper and lower bearing pads. In fact, the general construction of the lever may be as usual with its lower fiat side disposed toWard the table 4, except that at an intermediate point it is fitted with a fixed or integral axially extending sleeve or tube 7 that projects upwardly from the upper side thereof. This sleeve. is threaded interiorly to receive the reduced or free threaded end of a pivot screw 8. The screw is passed up through a threaded aperture 9 in the connecting portion or table 4, and has a head or shoulder 10 arranged to cooperate with the under side of the latter.

The head 10 is preferably locked against the support and it will, therefore, be understood that when the guard lever 5. is vibrated, either by pressure on the fingerpiece 15 or under the influence of the posi tioning spring to be later described, it will turn on the threads of the pivot screw 8 as a bearing. Of course, in so doing, it will move axially also on the threads, but the arc of movement of the lever is so short that this rising and falling of the lever occurs .only to a negligible degree and will not be noticeable, particularly if the threads are made with a minimum lead. At the same time, it will be noted that the threads really increase the bearing surface so that wear is distributed; they prevent the disengagement of the guard, or any lost motion thereof, in an axial direction, and the sleeve 7 gives good thread length with the net result that the lever is very rigidly supported, except with respect to the horizontal movement that it is intended to have, and cannot tilt'or wabble vertically.

The spring 11 that I prefer to employ, for positioning each guard and maintaining the nose bearing portions in clinging contact with the nose, is of flat spiral form and preferably composed of a single straight strip or ribbon of flat material. as shown in Fig. 5. It is arranged above the lever and coiled about the sleeve 7 as a centering pro jection to comprise as many convolutions as are desired or found practicable, and it may be inserted in position or detached over the free end of the sleeve whether the guard lever is removed from or in place upon the mounting, as will be apparent.

In the present instance, the inner end of the spring acts against the guard lever, and

the outer end against the support or a sta-' tionary part of the mounting, say one of the lens straps 3, as shown in Fig. 2. For these purposes, the outer end may be simply bent at right angles flatwise of the material, as at 12, While the inner end is fitted with a hook or abutment 13 that I prefer to form by providing an inclined notch or open slot l t in the lower edge thereof. The direction of inclination of the notch 14: is such that the hook is caused to interlock with a laterally projecting abutment 16 on the tubular portion 7 of the guard by the tension of the spring. This abutment 16 may be substantially of the form shown and is preferably arranged close to the lever arm 5 or near the base of the sleeve.

In applying the spring to the guard lever 5, when the latter is in place on the mount ing, it is slipped over the sleeve 7 and pivot 8, and the outer end engaged with the support, after which the inner end is drawn back against the tension of the spring and hooked over the abutment l6, and in removing it with the guard attached these operations are reversed, there being insuilicient room to allow the outer end to swing around and be engaged last.

In applying the spring with the guard lever detached from the mounting, however, it is simply placed over the tube 7 and rotated (to the right in the present instance) whereat the hook will find engagement with the abutment and then the outer end of the spring 12 may be engaged with the support under tension and the lever held against displacement until the screw 8 is threaded up from below, first through the support and then the lever. The spring is very easily removed with the lever detached because it is free to rotate thereon and will ride out of engagement with the abutment 16 when rotated in the other direction or to the left in the present instance, these directions being given with reference to Fig. 5 or the left hand side of the mounting.

It will be observed that the interlocking connection for the inner end of the spring is of such a nature that the latter is locked against disengagement over the free ends of the tube and pivot as long as the spring is under tension.

In Fig. 6, is illustrated, a pivotal connection that may be used in connection with certain features of the invention, the only difi'erence being. however, that the screw 8 has a cylindrical enlarged portion 17 near its head that turns in a cylindrical untion with a support having a threaded aperture therein and a finger piece guard lever mounted thereon and provided with an axially extending'interio'rly threaded sleeve, of a threaded pivot post extending into the aperture and sleeve. 2

3. In an eyeglass mounting, the combination with a support and a finger piece guard lever mounted thereon, of a pivot post locked to one of said members and threaded into the other to permit their relative movement on a threaded portion of the post as a bearing.

4c. In an eyeglass mounting, the combination with a support and a finger piece guard lever mounted to turn on one side thereof, of a pivot post having a headed portion on the opposite side .of the support and a portion threaded through the lever to project beyond its opposite face, and a coil spring surrounding the portion of the post on the opposite side of the lever from the support.

5. In an eyeglass mounting, the combination with a support and a finger piece guard lever mounted to turn thereon, of an axially extending projection on one of said parts having a laterally projecting abutment thereon, and a spring for positioning the guard lever coiled about the projection to be independently removed and replaced over the free end thereof and having one end hooked on the abutment and so formed as to lock with the latter by a movement longitudinally of the axis of the lever and the other acting against the other part.

6. In an eyeglass mounting, the combination with a support and a finger piece guard lever mounted to turn thereon, of a projection carried by one of said parts arranged axially of the lever and having a laterally projecting abutment thereon, and a flat spiral spring formed of flat stock, coiled about the projection to be removed and replaced over the end thereof and provided withan open recess at its inner end formed edgewise of the stock and detachably engaged over the abutment by a'relative axial movement of the spring and projection, the outer end of the spring being arranged to detachably act upon the other member.

7. In an eyeglass mounting, the combination with a support and a finger piece guard lever mounted to turn thereon, of an axially extending projection proceeding from the lever having a laterally projecting abutment thereon and a flat spiral spring for positioning the guard lever, formed of flat stock, and coiled about the projection, the inner end of the spring being provided with a hooked portion formed edgewise of the stock and engaging the abutment and the outer end being arranged to act against the support.

8. In an eyeglass mounting, the combination with a support and a finger piece guard lever mounted to turn thereon, of a tubular projection proceeding from the lever away from the support having a laterally projecting abutment thereon, a pivot extending through the sleeve and connected to the support, and a flat spiral spring for positioning the guard lever formed of flat stock and coiled about the sleeve and pivot to be removed from the free ends thereof, the inner end of the spring being provided with a hooked portion formed edgewise of the stock and engaging the abutment and the outer end being arranged to act against the support.

LEO F. ADT. Witnesses:

HARRY D. SMITH, E. S. VAN OLENDA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

